diff options
Diffstat (limited to 'deps/v8/src/base/platform/platform-posix.cc')
| -rw-r--r-- | deps/v8/src/base/platform/platform-posix.cc | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/deps/v8/src/base/platform/platform-posix.cc b/deps/v8/src/base/platform/platform-posix.cc index 664ed301c8..280d7f88f8 100644 --- a/deps/v8/src/base/platform/platform-posix.cc +++ b/deps/v8/src/base/platform/platform-posix.cc @@ -581,7 +581,25 @@ void OS::FreeAddressSpaceReservation(AddressSpaceReservation reservation) { // Need to disable CFI_ICALL due to the indirect call to memfd_create. DISABLE_CFI_ICALL PlatformSharedMemoryHandle OS::CreateSharedMemoryHandleForTesting(size_t size) { +#if V8_OS_LINUX && !V8_OS_ANDROID + // Use memfd_create if available, otherwise mkstemp. + using memfd_create_t = int (*)(const char*, unsigned int); + memfd_create_t memfd_create = + reinterpret_cast<memfd_create_t>(dlsym(RTLD_DEFAULT, "memfd_create")); + int fd = -1; + if (memfd_create) { + fd = memfd_create("V8MemFDForTesting", MFD_CLOEXEC); + } else { + char filename[] = "/tmp/v8_tmp_file_for_testing_XXXXXX"; + fd = mkstemp(filename); + if (fd != -1) CHECK_EQ(0, unlink(filename)); + } + if (fd == -1) return kInvalidSharedMemoryHandle; + CHECK_EQ(0, ftruncate(fd, size)); + return SharedMemoryHandleFromFileDescriptor(fd); +#else return kInvalidSharedMemoryHandle; +#endif } // static |